Edge storage presents a viable data storage alternative for application vendors (AV), offering benefits such as reduced bandwidth overhead and latency compared to cloud storage. However, data cached in edge computing systems is susceptible to intentional or accidental disturbances. This paper proposes a decentralized integrity auditing scheme to safeguard data integrity and counter the traditional reliance on centralized third-party auditors (TPA), which are unfit for distributed systems. Our novel approach employs edge servers (ES) as mutual auditors, eliminating the need for a centralized entity. This decentralization minimizes potential collusion with malicious auditors and biases in audit outcomes. Using a strategic game model, we demonstrate that ESs are more motivated to audit each other than TPAs. The auditing process is addressed as a Nash Equilibrium problem, assuring accurate integrity proof through incentives for ESs. Our scheme's security and performance are rigorously assessed, showing it is secure within the random oracle model, offers improved speed, and is cost-effective compared to existing methods.

翻译：边缘存储为应用供应商提供了一种可行的数据存储替代方案，相较于云存储具有降低带宽开销和延迟的优势。然而，边缘计算系统中缓存的数据容易遭受有意或无意干扰。本文提出一种去中心化完整性审计方案以保障数据完整性，并摒弃传统上依赖集中式第三方审计员的不适用于分布式系统的做法。我们的创新方法采用边缘服务器作为相互审计者，消除了对集中式实体的需求。这种去中心化设计最大程度减少了与恶意审计员勾结的可能性以及审计结果的偏差。通过战略博弈模型，我们证明边缘服务器比第三方审计员更有动机相互审计。审计过程被建模为纳什均衡问题，通过为边缘服务器设置激励机制确保完整性证明的准确性。我们对方案的安全性和性能进行了严格评估，表明其在随机预言模型下是安全的，并且与现有方法相比具有更快的速度和更高的成本效益。